Without looking at all your financials, we can't guarantee that you will qualify for a Chapter 7 bankruptcy without issues. Your attorney should have prepared a means test. If you pass the means test, you can file Chapter 7, if you don't pass, you have to have justificaiton on why you should. There's a good means test calculator on another website you can use.
The issues that may exist for you are how you spent the money you received from your tax return, and if any tranfers were to insiders. From what you've said, it sounds like you did not make a payment to one creditor over another (exceeding $600 in the 90 days up to filing) or transfer money to an insider, such as an immediate family member 1 year prior to filing.
Generally, you should stop using credit immediately, and generally delay filing by at least 90 days from the day you last used your credit cards. Your attorney should be able to provide guidiance on specific transactions though. For example, if you stopped using credit 120 days ago, but then a Netflix charge came through, you're probably fine. If, on the other hand, you charged $600 to Louis Vuitton 60 days prior to filing, your creditor may go after you.
So far your attorney's advice seems appropriate. Trust your attorney -- unless this is his/her first filling, you should be fine.
